I read through your thread. You have gotten some excellent advice. I will reiterate some of the advice others have given you. First of all, you need to GAL. You've been working out at the gym - that's great. You mentioned golf and mountain biking. Do both of them. It really helps with the PMA. You need to take your focus off W and focus on yourself and your kids right now. GAL will make you feel a lot better about yourself and soon enough this will show through to W. But don't do it simply for this reason, do it for yourself. Secondly, do not pursue W and do not talk about R. You have been S for 4 months and what you were doing has not worked. You need to stop pleading with her to reconsider or you will keep pushing her further away. Try it for a period of time and see what happens. Be pleasant around W when you see/speak to her even if you have to prepare yourself mentally ahead of time. Once you start to see some babysteps, it becomes easier to do.
Give some of these things a try and see what happens. But remember to be patient. It may take time for your W to notice the changes in you.
Me47 H46 S13 M16 Piecing since May/09
"Life is 10% what happens to us and 90% how we react to it." Lou Holtz